I have not created one on the Lambdas yet-- as im not at the 5yr or 150,000 mile range. (Dexcool is now rated at 150K)

But If I was to do it today- with say 100,000 miles--- and knowing the system has no leaks I would look into draining the system via the lower radiator hose. I would not even bother flushing the system.

But with most coolant drained- and 100K--- I would probably even consider changing the thermostat.

I have not looked to see if theres a drain valve on the radiator on these vehicles.

I have not created one on the Lambdas yet-- as im not at the 5yr or 150,000 mile range. (Dexcool is now rated at 150K)

But If I was to do it today- with say 100,000 miles--- and knowing the system has no leaks I would look into draining the system via the lower radiator hose. I would not even bother flushing the system.

But with most coolant drained- and 100K--- I would probably even consider changing the thermostat.

I have not looked to see if theres a drain valve on the radiator on these vehicles.

There is No drain valve so yes the easiest way is to remove the lower hose from the stat and yes for the 40 bucks I would replace the T-Stat also. it is REALLY easy.

If the coolant looks clean i would not flush it either.. otherwise just flush some distilled water through it

In the pic- you can see the throttle bodyright by it- you can see that foam looking block-- that is covering the HPFP. on a side note---(The high pressure side of the DI engine fuel lines are 1 use only--- so dont remove/loosen these unless youre really working on the HPFP- or youll be buying new expensive connections)...but below this block is the thermostat.

You can see the shiny pipe that leads to the thermostat--- you can also see a clamp with a rubber hose attached to it.

below my 2010 engine pic is the Thermostat on Ponchonuttys Outlook.

if you have trouble figuring out whats what..compare the location of the transmission cable mount bracket in both pics.